Re: Old Activity Units?

["J. J. Rozental" <josrozen@netmedia.net.il>]

The first IAEA's Safety Series, the Safety Series number 1 - Safe Handling
of Radioisotopes, STI/PUBL 1 - Dec. 1958 define:

Curie: A unit of radioactivity defined as the quantity of of any radioactive
nuclide in which the number of desintegrations per second is 3.700 E10.
Denoted by "c".

Microcurie (uc)

Milicurie (mc)

J. J. Rozental <josrozen@netmedia.net.il>
Consultant, Radiation Safety & Regulation
for developing country, 
Israel

At 17.51 22-01-97 -0600, you wrote:
>As an old timer, I would suspect that MC is actually written in lower case
>(ie mc) and means millicurie; the ancient abbreviation for curie was c
>before it was changed to Ci to avoid confusion with the symbol for the speed
>of light.
>
>Ron Kathren
>
>>
>>Howdy,
>>
>>We recently "found" an old set of beta reference sources with activity
>>units which I do not quite understand.  The date on the set is
>>November 1958.  The set contains:
>>
>>   Bi-210   1.07 X 10^-5 MC
>>
>>   C-14     14.3 X 10^-5 MC
>>
>>   Pa-234   1.00 X 10^-5 MC
>>
>>Any help identifying these units would be greatly appreciated.  Please 
>>reply to me directly.
>>
>>Thanks,
>>
>>Tracy
>>
>>====================================================================
>>Tracy N. Tipping                                Work: (913) 532-2668
>>Laboratory Safety Officer                       FAX:  (913) 532-6806
>>James R. Macdonald Laboratory                   Home: (913) 539-1378
>>116 Cardwell Hall                               Amateur Radio: N0OEY
>>Kansas State University                         tipping@phys.ksu.edu
>>Manhattan, KS 66506-2604            http://www.phys.ksu.edu/~tipping
>>====================================================================
>>
>>
>>
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